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I’ve been playing around with the Text CAPTCHA demo page and wondered how well WolframAlpha is at logic questions. As it turns out, Wolfram is pretty smart! Although, since a CAPTCHA requires an exact answer, some of the results from WolframAlpha are logically correct, but are not exactly correct. If someone wanted to use WolframAlpha to crack the text CAPTCHA technology, they could build in filters and such to narrow down answers to what the CAPTCHA is likely looking for.

Out of 10 demo questions, 3 failed and 7 were correct (although, 4 had the correct answer but would fail a CAPTCHA if the exact answer was not parsed out). Here are the results:

Text CAPTCHA: What is seven hundred and forty four as a number? WolframAlpha: NumberQ[744] Result:ALMOST